Perhaps you should try some spelling variations:
hoc nghien » hoc hien
nghien nam » nghiep nam, nguyen nam, nghe nam
phuoc hien » phuoc hiep, thuoc phien, hoc hien
hanh cac » hang cac, hanh cat, nhanh cay
cac vung » cac ung, cac chung, cach dung
vien nam » viet nam, vien dai, van nam
hoc vien » hoc hien, hoc viet, hoc tieng
vung moc » dung mo, dung moi, dung mot
danh tac » canh tac, danh bac, danh thuc
dinh cac » tinh cach, dinh chuc, dinh chau
cac van » cac dan
van hoc » van hoa

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((( hanh cac vung ((hoc nghien) or (phuoc hien)) nam ) or ( ((danh tac) or (doanh tai)) ((vung moc) or (dung cho)) nghien nam ))) or ((( hanh cac van hoc vien nam ) or ( dinh cac van hoc vien nam ))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((( hanh cac vung ((hoc nghien) OR (phuoc hien)) nam ) OR ( ((danh tac) OR (doanh tai)) ((vung moc) OR (dung cho)) nghien nam ))) OR ((( hanh cac van hoc vien nam ) OR ( dinh cac van hoc vien nam )))).
• Adding a wildcard symbol may retrieve word variants: (((( hanh cac vung ((hoc nghien) or (phuoc hien)) nam ) or ( ((danh tac) or (doanh tai)) ((vung moc) or (dung cho)) nghien nam ))) or ((( hanh cac van hoc vien nam ) or ( dinh cac van hoc vien nam ))))*.